Windows 7 drops First OR Surname when entering new people

Whenever I add a child, the last name automatically appears.If I enter the first name and click enter, the surname disappears, but if I delete the surname and key it it again, it will stay.Then when i go back to work on the file to add more info, the name will disappear completely.To say I'm frustrated, would be putting it mildly.

I'm running Windows 7 home premium ver. 6.1, and the program as Administrator.I've been thru and done the Compatibility via the Control Panel running it with XP Service Pack 2 and also Windows 98.

Consequently, I haven't been working on my tree for 2 yrs.Has anyone else had this problem?

If not, can anyone suggest another program for me to use?What attracts me to Generations is that I can see ALL the children on the parents' screen (I have a number of families that have 15+ children---Irish catholics).